Troop Selection Limiter for Clan Castle Request
This sort of stems off something a guy said in that donation pool thread. When requesting donations a window like the one that pops up for donation appears with green borders around each troop square. When pressed the border turns red and that troop option does not appear when the request is made. This eliminates the need to dump troops you don't want, since clan mates could only donate what you choose. Troops that will not fit in the current CC will not be options automatically.